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Pei-de Liang, Jun Chen, Teng Wu, Jing Yan. 2025: Hydraulic characteristics of a large rotation-angle baffle-drop shaft through synergetic discharge from dry and wet sides. Water Science and Engineering, 18(1): 115-124. doi: 10.1016/j.wse.2024.08.002
Citation: Pei-de Liang, Jun Chen, Teng Wu, Jing Yan. 2025: Hydraulic characteristics of a large rotation-angle baffle-drop shaft through synergetic discharge from dry and wet sides. Water Science and Engineering, 18(1): 115-124. doi: 10.1016/j.wse.2024.08.002
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Hydraulic characteristics of a large rotation-angle baffle-drop shaft through synergetic discharge from dry and wet sides

doi: 10.1016/j.wse.2024.08.002

  • a. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China;

  • b. Key Laboratory of Hydrologic-Cycle and Hydrodynamic-System of Ministry of Water Resources, Hohai University, Nanjing 210098, China;

  • c. College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China

Funds:

This work was supported by the National Key Research and Development Program of China (Grant No. 2021YFD1700802).

  • Received Date: 2024-03-20
  • Accepted Date: 2024-08-16
    • Available Online: 2025-03-05
    Abstract
  • To enhance the operational capacity and space utilization of baffle-drop shafts, this study improved the traditional baffle-drop shaft by expanding the wet-side space, incorporating large rotation-angle baffles, and installing overflow holes in the dividing wall. A three-dimensional turbulent model was developed using ANSYS Fluent to simulate the hydraulic characteristics of both traditional and new baffle-drop shafts across various flow rates. The simulation results demonstrated that the new shaft design allowed for discharge from both the wet and dry sides, significantly improving operational capacity, with the dry side capable of handling 40% of the inlet flow. Compared to the traditional shaft, the new design reduced shaft wall pressures and decreased the mean and standard deviation of pressure on typical baffles by 21% and 63%, respectively, therefore enhancing structural safety. Additionally, the new shaft achieved a 2%-12% higher energy dissipation rate than the traditional shaft across different flow rates. This study offers valuable insights for the design and optimization of drop shafts in deep tunnel drainage systems.

     

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